Once you enter room 312 of the Lakeview Hotel (the room where James and Mary stayed) look to James' left. Next to the wardrobe there is a vanity and the mirror on it is covered with a light colored cloth. So what's the deal with a covered mirror? In Jewish tradition when a person dies the mirrors in one's home are covered for several different reasons.
Here is what the website http://www.mazornet.com says about the practice....
Many lessons are drawn from the well known Jewish custom for mourners to cover their mirrors.
Covered mirrors remind a mourner to look to others for sympathy and not to expect to be a tower of self-reliance and strength. Shiva is a time to look inward at the deepest parts that hurt, when superficial answers and the mirrorâ€™s reassurance â€œyou look like youâ€™re holding up wellâ€ do not help.
A mirror-free home keeps personal vanity out of sight, a considerate gesture when the deceased can no longer achieve physical beauty.
Each person is created in the image of God. Each loss is diminishes this image, so to speak. Covered mirrors reflect this loss.
On a practical level, covered mirrors act as reminders of the Halacha to refrain from marital relations during Shiva. Putting on just the right shade of lipstick, checking out a shave in the mirror in preparation for an intimate evening is applauded by Judaism, which celebrates physical love between husband and wife â€“ but not during Shiva. Mirrors lose their mitzvah connection during this mourning period, so they are covered.
There is also a rather prominent appearance of (another? the same?) covered mirror to the observant viewer that can be viewed in a scene that only plays in the opening movie. We see Laura enter a room (Mary's sick room? Room 312?) and next to her is a vanity with a covered mirror.